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After the battle, you look at your hands... why did I became a skeleton? by Quinme
Fandoms: Undertale (Video Game)
06 Jul 2026
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Your dear friend Reishu was in danger, she suddenly got attacked by a mysterious skeleton in a black and white clothes. In this fight you truly did your best to protect her, giving it your all, but that wasn't enough.
After a long battle, you lay on the ground, defeated and hurt. To your surprise, the unknown skeleton doesn’t end you on the spot, leaning closer to you instead. He’s saying something, but stubbornly you hear none of that, refusing to listen to the words of the intruder!
With your last breath, you use the bits of the power that is left inside of your poor, tired soul. Using your magic for the first time in those past ten years felt like a stretch for your already exhausted state, but you don't care. You need to get rid of this guy!
A splash of wild magic appears, consuming both of you into the darkness.
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Decay was persistent. Anyone who had survived the Final War was cursed.
Your closest friends, the eccentric Serif brothers, were persistent in their efforts to keep you lucid. It was a losing battle. Still, you played along, indulging them in their game of make-believe. You would treasure the memories while you still had them. But nothing was permanent.
…It was sudden. A split second. An abrupt force hooked onto your long forgotten soul, dragging you and the brothers into an alternate universe.
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The line between nightmares and reality blur when you begin to suffer a repetitive sleep paralysis hallucination who seems to have a disturbing obsession with you.
Series
- Part 1 of The Sleep-Related Sanses as Yanderes
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You've accidentally brought your alternate into this world, + Classic AU versions of Sans crash into his universe, but the completely unrelated machine is broke and they need to get home. The how will they all do it? Tune in to find out eventually.
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Roman is your average college student. Overworked and underfucked. Too little sleep and too much caffeine.
However, she starts to find that her serious lack of sleep is leading to some crazy dreams.
Dreams in which she's now a skeleton, with three alternates, and a buncha other skeletons that seem hell-bent on trying to get her to understand that she's not in fact in a dream after all.
Will she ever believe them? And how much will it take her to get there?
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Disaster Coded || Error x Reader by Strawberry_Milk_Snake
Fandoms: Undertale (Video Game)
05 Jul 2026
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There's only one rule for those capable of AU hopping: never bring a real person into the Undertale multiverse. But, like all rules, it was destined to be broken.
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Making A Monster by absurdmagewrites
Fandoms: Undertale (Video Game), Underfell-fandom, Underswap-Fandom, Swapfell-Fandom, Fellswap-Fandom, Fellswap Gold-Fandom, Horrortale-fandom, Crafttale-Fandom, Seaswap-Fandom
05 Jul 2026
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Sometimes life throws you a curveball. For you, your curveball was going to bed looking like a human, and waking up looking like a monster.
A skeleton monster to be precise.
With the barrier breaking, a large surge of magic descended on the town you live in, and transformed you overnight. Unsure what to do with you, and the others changed, you're ushered into a facility until a monster with similar magic can take you to teach you how to wield the now uncontrollable magic you've been given. After waiting in this place for four years, you'd given up hope that anyone would ever want to take you.
What a surprise for you when you find out that someone does. A lot of someones.
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You were an ordinary maintenance worker, part of the crew of the Aurora when it crash-landed on an alien world and left you stranded in a hostile ocean. There are probably worse places to be stuck; at least the scenery is pretty, and you've always been passionate about marine life and alien research.
...what exactly did your PDA mean by "multiple leviathan class lifeforms?"
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You only wanted a normal life.
Then you met them.
Sanses and Papyruses from different worlds, each carrying their own past, their own wounds, and their own ways of becoming part of your life.
For a while, it almost felt simple.
Then the timeline broke.
Now everything has started over. They don’t remember you. You don’t remember what you lost. And yet, somehow, the same familiar warmth keeps finding its way back.
Because some bonds do not disappear just because the world forgets them.
Arc 1: (Familiar Warmth) Chapter 1-18
Arc 2: (What Survived) Chapter 19-20
Arc 3: (True Beginning) Chapter 21-60 (Subject to Change) -
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You were kidnapped by the Bad Sanses gang because you apparently "stole" Horror's axe. All hell breaks loose.
arc 1 (1-15): encounter
arc 2 (16-?): after -
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[Honestly..
After everything you've been through you didn't expect to find yourself here, in the middle of a fight between two men you recognized too much to be normal, with your unconscious husband in your arms having a near death grip on both newborns while you could at least stand without feeling your legs numb.
You lost hope of being able to hide when both turned to look at you and your dear still sleep in your arms, whom you quickly hid from sight with your cloak, covering him as much as you could.
"Fuck.."]
Or; After years of being responsible for making the impossible possible in a crumbling world, your people receives an unexpected but not less welcome peace. You don't plan on freeing your claws from this chance.
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Everybody Here Wants You by FuCkInG_FaBuLoUs
Fandoms: Undertale (Video Game), Underfell - Fandom
05 Jul 2026
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Hmm, such a thing of wonder in this crowd
I'm a stranger in this town
You're free with me
And our eyes locked in downcast love
I sit here proud
Even now you're undressed in your dreams with me~~~~~~~
You didn't cheat out of retaliation. To make things even. Perhaps some part of you did, a small vindictive part that had been simmering ever since you found those lipstick marks on his collar, and perfume wafting off of his clothes that certainly wasn't yours.
No, you just wanted someone to touch you, needed it after a year of just you and your fingers. And, oh, that skeleton you found at the club? He most certainly knew how to do that, and then some.
But, Alas, you only planned for it to be a one time thing, a nice night to help fill that ache in your chest, for now, atleast, until it came crawling back. You didn't think you would ever see him again.
And then you did.
Over
And Over.
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《Underfell! Sans x Reader fic》
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There are a number of little ideas within my head—or strikes of inspiration from fellow Undertale creators—that I'd love to write about! But they need a home...
Welcome to Reader x Everyone in the Multiverse!
I don't have a schedule, but I try to post often! I hope you enjoy these stories :3c
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Most people spend their whole lives wishing that someone would come along and sweep them off their feet.
But what happens when that person is already in a relationship?
Who will fate honor? And who will be cast aside in the dust.
And the more important question... who will get a better grade on their quantum physics final?
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A misunderstanding lands you in a meeting of monsters and fetishists. From the chaos you find yourself in the dynamic company of a kinky Mutt, gasterblaster! Sans, and a cat-ear wearing Axe.
Deals are made. Boundaries are broken. You become thoroughly entangled in this group of horny skeletons with very unhealthy coping mechanisms. Even with your PATIENCE, and the comfort of your cute rescue collie, there’s some skeletons that are better left in the closet… -
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Y/N's life in the village is changed forever when a new monster enters her life... Soon everything starts changing and coming to light... The only problem is.... Everyone knows, but her....
(Summary Updated on May 28, 2026)
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Your name is unimportant. Your job is nonexistent, really. And your (ex)roommate just kicked you out in the middle of a surprisingly cold November night. But whatever. You don't care. You'll be fine.
Keep telling yourself that as you freeze to death, idiot.
But you'll be fine, for one reason! Two, actually. Two people - monsters really - who just so happen to have the same names as some fonts you know of? You stay with them instead, just to get back on your feet, and a single question rises to your mind.
What the hell is keeping you here?
(Explicit chapters marked with ***. Explicit chapter count: 2)
Book One: The Answer (Chapters 1 to 60)
Book Two: The Question (Chapters 61 to Present)Series
- Part 1 of The Sans x Reader Trilogy and Extras
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When the quiet solitude of your new life is disrupted by a gaggle of skeletons moving in next door, you and your sibling find yourselves pulled into their orbit. Healing takes time, but maybe, this chaotic, affectionate family is exactly what your soul has been waiting for.
*Inspiration taken from "Bonely Hearts Club" fangame by owl-bones (http://bonelyheartsclub.tumblr.com)*
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